Parts changed in the check
Life-limited part trace review for aircraft-management teams at heavy-check exit
When a managed aircraft finishes a heavy check, this review makes sure every life-limited part fitted, removed, or disturbed during the visit lands in the owner's records with complete trace. It checks the updated LLP status sheet against the check package, verifies release certificates and part histories for installed parts, and confirms cycle records carried through the visit correctly. A records specialist runs it at visit closeout, before the aircraft departs the facility. The owner's representative receives a verified status update, a missing-paper list, and a file package ready to enter the owner's permanent records.
When this review is needed
- A heavy check involved LLP replacements and the owner's records must absorb the movements before the aircraft flies away.
- Exchange or pool parts were fitted during the visit and their prior histories have not been collected.
- The facility's proposed status update reflects the planned workscope rather than what actually happened.
- Removed cores are headed to the owner's spares inventory and their histories need closing out.
The problem
Heavy checks are when LLPs actually move: parts come off for access or replacement, exchange units arrive from the facility's stock or a pool, and the paperwork for each movement is generated by whoever handled it. For a managed aircraft, the owner's records sit one step removed from the hangar floor, and paper that is not captured before departure has to be recovered later through the management company, the facility, and the part supplier in sequence.
What gets reviewed
- All LLP movements during the visit: installations, removals, and re-installations after access
- Release certificates for each installed part, matched to the facility's fitment records
- Part histories and back-to-birth continuity for parts sourced from stock, pools, or exchanges
- The updated LLP status sheet against the pre-check baseline plus visit movements
- Cycle and time bookkeeping through the check, including any engine or APU runs
- Removal documentation and updated histories for parts leaving the aircraft
Scope this review
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What gets validated
- Every fitment record in the check package pairs with a release certificate carrying correct part and serial identity
- Installed parts sourced from exchange or stock arrive with history covering all prior operation, back to manufacture where required
- The post-check status sheet equals the pre-check sheet adjusted by exactly the documented movements
- Remaining-life figures for installed parts use the correct limit for configuration and rating
- Parts removed during the visit leave with updated histories and a recorded disposition
Evidence normally required
- The pre-check LLP status sheet and the facility's proposed post-check update
- Fitment and removal records from the check package
- Release certificates and history files for every part installed
- Exchange and purchase documents for parts sourced during the visit
- Aircraft time and cycle figures at induction and release
Common discrepancies
- An exchange part fitted with the pool's release but no history for its earlier operating segments
- A status sheet updated from the planned workscope rather than the movements that actually happened
- Re-installed parts missing the removal-and-refit entries that keep their trace continuous
- A removed core sent for disposition before its history card was updated
What is at stake
An LLP installed during a check with incomplete trace quietly degrades the aircraft's documentation standard, and the degradation stays invisible until the next lease, sale, or export forces a back-to-birth demand. Removed parts suffer too: without their updated histories, serviceable cores lose resale value in the owner's spares inventory.
How the work runs
Baseline and collect
Fix the pre-check status and gather every movement record from the check package.
Match part to paper
Pair each installed part with its release and history, and each removal with its updated card.
Reconcile the sheet
Prove the post-check status equals baseline plus documented movements, and correct it where it does not.
Package for the file
Assemble the owner file package and issue the missing-paper list before departure.
What the buyer receives
- A verified post-check LLP status update reconciled to the movement evidence
- A missing-paper list naming the holder and the requested document for each gap
- An owner file package of certificates, histories, and entries ready for the permanent records
Who uses the output
- The owner's representative accepting the aircraft back from the check
- The management company's maintenance control updating tracking systems
- Records custodians filing the visit into the owner's permanent documentation
How the work fits into the transaction or program
This review is the records half of taking the aircraft back from a heavy check: physical acceptance confirms the work, and this pass confirms the paper. Captured now, the visit's LLP documentation flows straight into the owner's file; captured later, every document requires a three-party chase.
Start with a single asset
Reconcile maintenance tracking against source records.
Jurisdiction-specific considerations
Parts arrive under either an FAA Form 8130-3 or an EASA Form 1, each satisfying its own system, and the owner's future plans decide whether dual acceptance matters. FAA Order 8130.21 and Regulation 1321/2014 govern the respective forms, while 14 CFR 91.417 frames the retention the owner's file must support, so capture is done to the stricter standard the owner is likely to need.
Regulatory limits
The review verifies documentation of part movements. It does not approve any part for installation, certify the check, set or extend life limits, or perform the physical acceptance of the aircraft.
What this review does not cover
- Physical inspection of installed parts or verification of data-plate markings
- Commercial resolution of exchange fees or core charges
- Disposal or sale handling for removed parts
Specific to this review
- Parts fitted from a facility's stock carry the facility's release, which covers its own work; their earlier life still needs independent history, and that distinction is missed constantly.
- Access removals and refits look like non-events but break trace when the refit entry is skipped, because the part's location history no longer matches the aircraft's.
- The owner's leverage for chasing part paperwork peaks on the day the aircraft comes back from the check and decays with every invoice paid afterward.
- A removed core holds value only while its history stays current; without an updated card it sells at scrap-adjacent prices.
Sources
U.S. Government (eCFR). Records an owner or operator must keep, including total time in service, current status of life-limited parts, and AD compliance.
Federal Aviation Administration. Completion and use of FAA Form 8130-3, Authorized Release Certificate, for new and used parts.
European Union / EASA. Continuing airworthiness, maintenance records, CAMO responsibilities, and the airworthiness review process in the EASA system.
Frequently asked questions
The MRO provides a full closeout package. Does the owner still need an independent pass?
The facility's package documents its own work and sourcing. The owner's standard is broader: back-to-birth continuity, dual-release needs, and spares value for removed cores are owner concerns the facility has no obligation to cover, and they are exactly where the gaps appear.
Relevant glossary terms
Related pages
Where this fits
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